Globe holder



Dec. 29', 1925- A 1,567,064

M. LA SCOLA GLOBE HOLDER Filed Jan. 19, 1925 2 Sheets-Sheet 1 FIE-1.1.

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. M. LA SCOLA GLOBE HOLDER IN VENT 0/? WITNESSES Patented Dec. 29,.1925.

'UNHTED STTEfi mama PATENT OFFICE.

MICHAEL LA SCOLA, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 IMARKELLIGHT- ING FITMENTS, INCL, OF BUFFALO, NEW YORK, A CORPORATION OF NEWYORK.

GLOBE HOLDER.

Application filed January 19, 1925. Serial No. 3,233.

To all whom it may concern:

Be it known that I, MICHAEL LA SCOLA, a citizen of the United States,and a resident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in GlobeHolders, of which the following is a speclfication.

The invention relates to globe holders for electric lamp fixtures of thegeneral type in which radially movable globe-engaging fingers are movedto and from globe-engaging position by the relative movements of twoelements of the holder.

The object of the invention is to provide a globe hold-er of the generalcharacter explained which is simple in construction, neat inappearance,economical to manufacture, and which affords ample spaceinteriorly for alamp and socket, and a holder in which theglobe-engaging fingers may be securely held at various radial positionsto properly support globes which differ in size, and in which suchfingers are effectively held against sidewise displacement while beingmoved radially to engage or release a globe.

The invention is illustrated in the accompanying drawings of which Fig.1 is a vertical central sectional view of a globe holder in which thefingers are arranged to move outwardly for engaging the inside of aglobe, the plane of view being indicated by the line II, Fig. 2; Fig. 2a transverse sectional view taken on the line II-II, Fig. 1; Fig. 3 aview corresponding to Fig. 1 showing a modified form of globe-holder inwhich the fingers are moved inwardly to engage the outside of a globe;and Fig. 4 a transverse sectional view taken on the line IVIV, Fig. 3.

Referring first to the embodiment of the invention illustrated in Figs.1 and 2, the holder includes a casing 1 provided interiorly with arotatable ring 2 which may be conveniently held transversely of thecasing between an outwardly extending ledge 3 of the casing and aninwardly extending bead 4 formed below the ledge. The transverse portionof' ring 3 is provided with a plurality of curved slots 5 which areeccentric with relation to each other and to the cylindrical side wallof the casing, and through which globe-engaging fingers 6 extend. Thesefingers, which are preferably formed of sheet metal, are pivotallymounted at their upper ends in the casing side wall, and for thispurpose their upper ends may be provided with hooks 7 adapted to engagethe casing at suitable openings formed in it.

"The lower ends of the fingers are turned outwardly to engage theinterior face of a globe 8 at its top opening. By rotating ring 2 withinthe casing, the lower ends of the globe-engaging fingers are movedradially, either inwardly or outwardly depending upon the direction ofrotation of the ring. Their outward, globe-engaging positions areindicated in full lines on Fig. 1 and their inward, globe-releasingpositions in dotted lines.

To prevent the fingers from being displaced or moved sidewise by therotation of the ring, a matter which is liable to cause the fingers tobind or look the ring against rotation, the casing and fingers areprovided with cooperating openings and tongues. Preferably the fingersare provided with openings 9 below their pivot points, and the casingwith inwardly extending tongues 10 which project through the openings 9at all radial positions of the fingers. The tongues 9 may, as indicated,be conveniently struck from the side wall of the casing. By suchconstruction, each finger is held at two points against sidewisedisplacement, namely at its upper pivot point and at its openings 9, sothat the fingers cannot lock the ring against its required rotation.

Because globes vary somewhat in size, due among other things to theconditions of their manufacture, the fingers are not always at the sameradial position for engaging ifferent globes. The invention accordinglycontemplates the provision of a clamp to firmly hold the fingers invariable globe-engaging positions to accommodate various siz s ofglobes. To this end, the easing is provided with an arcuate slot throughwhich there extend a clamping member engageable from the exterior of thecasing and attached to ring 2. Preferably, an arcuate slot 11 is formedin ledge 3 of the casing adjacent to ring 2, and a threaded pin 12,attached at its inner end to ring 2, extends through such slot and isprovided exteriorly with a thumb screw 13. When the thumb screw isloosened, ring 2 may be rotated or moved angularly within casing 1 byengaging the nut and moving pin 12 through slot 11. At such position asfingers 6 occupy when they firmly ngage a globe 8, nut 13 may be screweddownwardly upon ledge 3 to firmly clamp the ring against furtherrotation in either direction.

As shown in Figs. 3 and 4, the invention is applicable also to globeholders constructed to engage the outer face of a globe. In thisembodiment of the invention globe-engaging fingers 6 are curved inwardlyat their lower e ds to engage the outer wall of the flare at the upperend of a globe 8 and curved slots 5 in the transversely disposedrotatable ring 2 in which the globe-engaging fingers lie, extend in theopposite direction from the slots 5 of the embodiment of the inventionshown in Figs. 1 and 2. Henc the rotation of ring 2 from the positionindicated causes the lower ends of the fingers to move outwardly torelease the globe. The fingers are shown in full lines in theirglobe-engaging positions and in dotted lines in their open orglobe-releasing positions.

In other respects the construction of the globe holder of Figs. 3 and tis substantially the same as that of Figs. 1 and 2. It includes tongues10 projecting inwardly from the side wall of casing l through openings 9in the globe-engaging fingers to prevent their endwise displacement uponthe rotation of ring 2", and it also includes a pin 1) attached to ring2 and extending through a slot 11 of the casing. The pin is providedwith a thumb screw or clamping nut 13 to firmly hold the ring and casingin various relative angular positions so that the fingers may properlyengage and hold globes which differ in size.

In both embodiments of the invention, the upper portion of the casing ispreferably provided with a canopy 15, which may be variously shaped forornamental purposes, and the lower end of which hides the pivot pointsof the globe-engaging fingers. The canopy may be conveniently attachedto the upper end of the casing between the flanges of a stud l6 and aconnecting ring 17, which stud and ring are provided centrally with apassageway for electric conductors.

It is characteristic of the globe holder that its parts are so formedand constructed that the rotatable finger-moving ring may be providedwith a large central opening affording ample space toreceive a lampsocket and globe. Furthermore, the globe-engaging fingers being formedof sheet metal are sufficiently resilient to prevent breakage of globesdue to their thermal expansion.

According to tl provisions of the patent statutes, I have explained theprinciple and operation of my invention and have fully illustrated anddescribed two embodiments of it. However, I desire to have it understoodthat, within the scope of the appended claims, the invention may bepracticed by forms of construction varying from those particularly shownand described to hold glass globes from the inside or outside as may bedesired.

I claim as my invention:

1. A globe holder comprising an annular casing having a cylindrical sidewall, a ring rotatably mounted in and extending transversely within thecasing and provided with a plurality of eccentric curved slots, and aplurality of globe-engaging fingers extending through said slots andpivotally mounted at their upper ends in the casing side wall, thesidewall of said casing and said fingers being provided with cooperatingopenings and tongues to prevent sidewise displacement of the fingerswhen said ring is rotated to move the fingers radially within thecasing.

2. A. globe holder comprising an annular casing having a cylindricalside wall, a ring rotatably mounted in and extending transversely withinthe casing and provided with a plurality of eccentric curved slots, anda plurality of globe-engaging fingers extending through said slots andpivotally mounted at their upper ends in the casing side wall, each ofsaid fingers being provided with an opening below its pivoted end, andthe side wall of the casing being provided with inwardly extendingtongues projecting through said finger openings to prevent sidewisedisplacement of the fingers when said ring is rotated to move thefingers radially Within the casing.

3. A globe holder comprising an annular casing having a cylindrical sidewall, a ring rotatably supported by and extending transversely withinthe casing, and provided with a plurality of eccentric curved slots, aplurality of globe-engaging fingers extending through said slots andpivotally mounted at their upper ends in the casing side wall, saidcasing being provided with an arcuate slot adjacent to said ring, athreaded pin attached to said ring and extending through said slot, anda clamping nut on said pin for clamping said ring to the casing invariable angular positions with relation to it, whereby said fingers maybe held firmly at variable radial positions.

In testimony whereof, I sign my name.

MICHAEL LA SCOLA.

